from PV_Factory import PV_Factory
class State:
    def __init__(self):
        self.pf = PV_Factory
    # def enter(self, fsm):  
    #     pass  # 进入状态时执行的动作  
  
    # def exit(self, fsm):  
    #     pass  # 退出状态时执行的动作  
  
    def handle(self, fsm):  
        return self  # 默认情况下不处理事件，返回当前状态  